Wiper arm and blade connection



July 7, 1936- J. B. WHITTED WIPER ARM AND BLADE CONNECTION Filed Jan.4,' 1934 Patented July 7, 1936 WIPER ARM AND BLADE CONNECTION John B.Whitted, Evanston, Ill., assignor to Stewart-Warner Corporation,Chicago, 111., a corporation of Virginia Application January 4, 1934,Serial No. 705,167

6 Claims. (01. 15-250) My invention relates to windshield wipers andparticularly to the clip bywhich the squeegee blade of a windshieldwiper may be attached to the operating arm for the squeegee blade.

It is desirable in a device of this kind to provide a clip, forattachment of the squeegee blade to the operating arm of a windshieldwiper, which will permit a ready detachment of the squeegee blade inorder that new blades may be substituted for tongue M of the attachingclip IS. The clip l6, which is formed as a stamping, includes side wallsor flanges l8 and I 9, which are spaced apart a distance slightlygreater than the thickness of V the wiper blade H], whereby the blademay have a limited amount of angular displacement during its movement inopposite directions. The hooklike projection I 4 extends from the sidewall [9 transverse with respect to but spaced from the 10 old when theold blade has become worn and. conbottom edge of the wall I 8 and, asshown in Fig- 10 sequently inefficient as acleaning medium. ure 4,extends slightly beyond the side wall I8.

It is desirable also in a clip of this kind to allow The space betweenthe projection l4 and the wall the wiper blade a limited amount ofangular dis- I8 is sufficient to permit assembly of the blade placementor flop, in order that the blade may with respect to the clip andparticularly to perfall first on one side when operating in one direcmitthe outer edge of the blade to clear the 15 tion and the other whenoperating in reverse dilower edge of the side wall I8 during assembly,as rection. f V illustrated in dotted lines in Figure 2. Due to g In thepast, while such clips or attachment dethe length of the hook or tongueM, the wiper vices have been provided which would accomplish blade willnot become detached therefrom during 20 the above desired results, mostof them have been operation. 20 relatively expensive to manufacture whenviewed As shown in Figure 3 the stamped clip is prowith regard to thesimple function they are to vided with an offset channel-shapedportion.22 perform. It is an object of my invention to proadapted toreceive a bent portion 23 at the lower vide a clip or attachment meanswhich is simpler end of the operating arm 24. The walls of the 25 andcheaper to manufacture than those previously channel-shaped portion arestamped overthe por- 25 known, and which will at the same time accomtion23 of the arm and because of the bend in the plish the above mentioneddesirable results. arm, any torsional strain upon the clip will not Itis also a particular object of my device to cause it to turn about theoperating arm 24. I provide a clip which will not obstruct the view andTo connect the clip to the wiper blade, the

which is neat and pleasing in appearance. blade is brought to positionwith the hole adja- 0 In general, I accomplish these ends by means centthe hook-like portion and with the blade of a single stamped member,which is fastened substantially at right angles to the operating arm. bya means to be described later to the operating In this position, it willbe possible to slip the hookarm and by a hook-like projection to thewiper like projection into the hole in the wiper blade.

blade. This stamping has side walls to limit the The wiper blade maythen be turned to position 35 amount of flop of the blade, and whichalso substantially parallel to the operating arm and serve to hold theblade so that it may not turn it will be seen that in this position theblade with respect to the operating arm. will be held so that it cannotbe disengaged from A more thorough understanding of my inventhe hook. Itis to be noted that the hook-like protion may be had by one skilled inthe art by refjection or tongue [4 moves endwise into the hole 40 erenceto the accompanying drawing, in which: or opening instead of edgewiseand substantially Figure 1 is a front elevation of the wiper arm axiallyor centrally of the opening instead of raand blade in operativeposition; dially of the opening. The opening l2 when de- Figure 2 is aside elevation showing in dotted fined as a closed opening in the claimsis inlines the position of the blade for assembly with tended todistinguish from an opening which has 45 respect to the arm; a radialentrance slot, such as a key-hole open- Figure 3 is an enlarged view ofthe clip partially ing. in section to illustrate its connection with theWhile Ihave described one specific embodiment wiper arm; of myinvention, I do not intend to limit myself to Figure 4 is a side view ofthe clip, and this particular form. 50

Figure 5 is an end view of the clip. I claim:

The W p blade Shown in Figures 1 a 1. In a windshield wiper, a wiper armand a y be of y Conventional type and is provided wiper blade, saidblade having a lateral opening with a hole l2 whereby the blade may beassemtherethrough spaced from the edges thereof, a

bled with respect to a hook-like pr j t on tongue on said arm adapted toenter said open- 55 ing endwise, said blade being free to swing on saidtongue to its normal operating position with respect to said arm andmeans on said arm positioned to engage said blade to prevent lateralseparation while said blade is in operative position with respect tosaid arm and to be disengaged from said blade when the blade is swungabout the tongue to a position other than said operative position.

2. In a windshield wiper, a wiper arm and a Wiper blade, said bladehaving a lateral opening therethrough spaced from the edges thereof,said having a stamped channel-shaped portion adaptarm being formed witha bent tongue at one end thereof adapted to enter said opening endwiseto support said blade on said arm, said arm being formed with spacedflanges adapted to receive said blade as it is moved on said tongue toits normal operating position, said flanges serving to prevent lateralseparation of said blade with respect to said arm when said blade is inoperating position .with respect to said arm and to permit separation ofthe blade fromthe arm when the blade is swung about the tongue to aposition other than said operative position.

3. In a windshield wiper, a wiper arm, a wiper blade, a stamped'clipformed for securement to said arm and for detachable support onsaid blade, said blade having a lateral opening therethrough spaced fromthe edges'thereof, said clip being formed with a bent tongue adapted toenter said opening endwise and centrally of said opening, and said cliphaving spaced flanges between which said blade is retained in normaloperation, said flanges permitting the blade to be disengaged from thetongue when the blade is swung on said tongue to a position other thanits normal operating position.

4. In a Windshield wiper, a wiper arm and a wiper blade, and a stampedclip secured to said arm and adapted to detachably support said blade on.said arm, said blade having a lateral opening therethrough spaced fromthe edges thereof, said clip having a tongue thereon and said clip beingformed to permit assemblyof said blade with respect to said clip so thatsaid tongue may be received endwise in said opening, said blade beingfree to swing about said tongue from its assembled position to normaloperating position, said clip being formed with a channel-shaped portionpositioned to receive said blade in its operating position to retainsaid blade in supporting relationship with respect to said tongue, andto permit the blade to be disengaged from the tongue when the blade isswung about the tongue 7 to a position other thanits operation position.

5. In a windshield wiper, a wiper arm, a wiper blade, and a stamped clipthrough which said blade is detachably secured to said arm, said clip edto receive said arm and to be clamped securely thereto, said clip beingformed with spaced side walls adapted to receive said blade when saidblade is in operative position with respect to said arm, one of saidside walls having a bent tongue extending slightly beyond the other ofsaid side walls and spaced therefrom, said blade being formed with alateral opening therethrough spaced from. the edges thereof to receivesaid tongue endwise and centrally of said opening as said blade isassembled laterally with re-, spect to said arm, said blade beingfree'to swing upon said tongue into operative position in which it isretained againstdisplacement with respect to said tongue by said sidewalls. i

6. In a windshield wiper, a wiper arm having a bend adjacent the endthereof, a metal stamping clamped to and substantially enclosing thebendI of said arm so as to resist rotation relative to said arm, a hook-likeprojection on said stamping, a wiper blade having a lateral openingtherethrough spaced from the edges thereof adapted to engage saidhook-like projection, and spaced walls on said metal stamping adapted toreceive said blade therebetween so as to-prevent separation of saidblade from said arm, said'walls per-' mitting slight angulardisplacement of said blade during its operation and permitting the, armto be disengaged from the tongue when the blade is swung about thetongue a material amount to a position I away from the position betweensaid spaced walls on the metal stamping. f

, J OHN. B WI-IITI'ED.

